Calibrate a Drawing

Accurate takeoff measurements depend on using the correct scale for each plan sheet. Because drawings are created at different scales, Linarc uses AI to automatically detect any printed scale on the sheet and apply the calibration for you. When the scale is unclear, missing, or not detected, you can perform a quick one-time manual calibration to ensure precise measurements for all takeoff markups on that sheet.

• Linarc’s AI automatically scans each plan sheet for a clearly printed scale and applies it instantly.
• An auto-detected scale calibrates all measurement tools, allowing markups to display accurate dimensions.
• If the scale is missing, illegible, or cannot be identified by AI, manual calibration is required.
• Manual calibration is a simple one-time process per sheet.
• If the scale is not detected or setup, a notification pops-up whenever you open the plan sheet and try to add a markup

This article explains how to calibrate the measurement tool manually. 

To calibrate the measurement tool for a drawing

• Ensure that you are on the desired plan sheet. If not,
  • Open the Plans module of the project by clicking the app launcher, selecting 'Documents' and clicking 'Plans' from the top
  • The Plans module opens at the 'Plan Sheets' screen
  • Click the thumbnail of the sheet you want to open
• Identify a location on the drawing with known dimensions, for example, a length marking between two points in the drawing. An example is shown below:

• Click 'Add Markup'  
• Select the 'ruler' tool  
• Click on the location of the drawing where you want to place the ruler.
• Click the line to select it.
• Drag the handles at the ends to resize the line to cover the distance of the known dimension.

• Double-click on the line.
• Enter the known dimension in the 'Enter the Scale' box in feet/inches. For example, 26'00".
• Click 'Submit' to save the calibration.
• Click 'Save Markup' at the top-right.
• Enter a descriptive label and click OK to confirm and save.